Centrifugal, turbine, or like pump.



No. 782,271. PATENTED FEB. 14, 1905. F. RAY.

CBNTRIFUGAL TURBINE 0R LIKE PUMP.

APPLICATION FILED APB. 30, 1904.

llNiTED STATES FREDERICK RAY, OE EAST ORAN (1E, NEW JERSEY, ASSIGN OR TOHENRY R.

Patented February 14, 1905.

PATENT QEEICE.

WORTHINGTON, OF NEW YORK, N. Y., A CORPORA'IION OF N EW JERSEY.

CENTRIFUGAL, TURBINE, OR LIKE PUNIP.

SPECIFICATION forming part of Letters Patent No. 782,271, dated February14, 1905.

Application filed April 30, 1904. Serial No. 205,679.

To HN w71 rmt it 11mg/ ferme/2771].'

county of Essex, and State ofNew Jersey, have invented certain new anduseful Improvements in (`entrifugal, Turbine, or Like Pumps, full)Ydescribed and represented in the `following specification and theaccompanying drawings, forming a part of the same.

This invention relates to that class of centrifugal, turbine, or similarpumps in which inclosed impellers are used, the especial objects of theinvention being' to provide a simple and eflicient construction in whichfriction I is lessened by air-chambers on opposite sides of theimpeller, and to provide improved means for balancing the impeller andpreventing leakage at the hub.

The invention is applicable to pumps having either a single impeller orseries of impellers-that is, either single stage or multistage pumps;but certain features of the invention have been devised in connectionwith the application of the broad invention to multistage pumps, whichfeatures form specific parts of the invention.

For a full understanding of the invention a detailed description of aconstruction embodying the same in its preferred form as applied to amultistage pump having' two impellers will now be given in connectionwith the accompanying drawings, forming a part of this specilication,and the features forming the invention will then be speciticallgvpointed out in the claims.

1n the drawings, Figure 1 is a central section of the pump, takenlongitudinally of the axis. Fig. 2 is a cross-section on the broken line2 of Fig. 1. Fig. 3 is an enlarged detail section of a portion of one ofthe im pellers.

{eferring to said drawings, A is the pumpcasing, having the suction Band delivery C, and 1)' l)72 are the two impellers carried by the sha ftE and separated by the usual diaphragms 10, forming, with the endcasings 1,1, the impeller-chambers and the deliver'y-passage from thelirst to the second impeller. The hubs of l the two impellers D D abutagainst and are Be it known that l, FREDERICK Rana citizen of the UnitedStates. residing at East Orange,

separated by the packing-ring 12 on shaft E. The impellers are shown asof a common inclosed type, having the side walls 13 and vanes 1-1extending between the side walls, and on opposite sides of the impellersare chambers 15, in which run vanes 16, carried on the outside of theimpellerwalls 13. These chambers 15 extend from the outer edge of theimpeller inward to a packing-ring construction, presently to bedescribed, and the chambers are closed to the water-space of theimpeller by the side walls 13 and form airchainbers on the oppositesides of the impeller. The (,leliveigvv of the lirst impeller D passesoutward from the impeller through the usual diffusion-ring 17 and thensidewise and downward through the pass ge 18 to the suction of thesecond impeller l)"', and in this passage 18 are preferably arrangediixed vanes 19, extending downward to the suction of the secondimpeller. The air is preferabl)Y supplied to all the air-chambers 15 onopposite sides ofthe two impellers by passing the air through 'from oneside of the pump to the other, the air being admitted to the outsideair-chamber 15 at the delivery end of the pump from an air-compressor orother suitable means through pipe 1, the air passing from the chamber 15from one side of each impeller to the other through holes 2 in theimpeller-varies 1l and through the diaphragms and one of the [ixed vanes19 bv hole 3, an outlet-opening' 1 from the outside chamber 15 on theimpeller 1) being' provided, preferabl \Y controlled by an adjustableair-cock, as shown. Thus the air admitted through pipe 1 will passthrough the successive chambers 15 from one side of the pump to theother and out through the escape-pipe l. lt will be understood, however,that a separate supply-pipe ma)Y be used for each of the impellers oreach chamber, if desired; but the construction shown is simple andetlieient and is preferably used.

Referring no w to the balancing and leakagepreventingconstruction, eachof the impellers is preferably provided at the hub with an opening 20,through which the suction fluid passes to a balancing-chamber Q1 on therear of the impeller, so as to balance the suctionpressure. rI heimpellers are provided also with flanges 5 outside the openings 2O andoutside the suction-opening, which flanges form running-joints withshoulders or flanges 6 on the casings and diaphragms outside thesuction-openings and balancing-chambers.

Between the air-chambers 15 and the Arunning-joints 5 6 are arrangedintermeshing packing-rings, which are formed by projecting rings 7 onthe side walls 13 of the impellers alternating with rings 8 on apacking-ring 23, secured within depressions in the casings anddiaphragme outside the running-joints 5 6. For the purpose of supplyingthese packingrings with oil or water, distilled water preferably beingused so as to avoid the wear which would result from grit, suitableopenings are provided for admitting liquid, and, as in the case of theair-passages above described, these liquid-openings preferably form apassage extending through the pump, so that a single liquid-inletsupplies all the packingrings. As shown, there is a single liquidpassage9 passing through the outside casing to the outside packing-rings ofimpeller D, then through the impeller to the packing-rings on theopposite side of this impeller, then through the diaphragms and a fixedvane 19 to the inner packing-rings on impeller D2, then through theimpeller to the outer packing-rings on this impeller, and then to theoutlet from the casing. It will be understood, however, that as in thecase of the air this lubricating and sealing liquid may be supplied tothe packing-rings by separate pipes or by a single pipe for eachimpeller, if preferred.

The complete invention, as above described, provides a very simple andefficient construction of pump with the impellers running in air andwith the impellers efficiently balanced and leakage of air prevented.The outside vanes 16 in the air-chambers 15, as will be readilyunderstood, result in a centrifugal action within these chambers, whichsecures a small body of liquid within the chambers at the outer ends ofthe vanes, which efliciently seals the chambers against the escape ofair at the outer edges of the impellers, this lliquid being outside theair-pipe, so as to permit air to enter through these pipes. Theseoutside vanes also reduce the pressure toward the center to such anextent as to materially reduce the tendency of the air to escape towardthe center past the joints 5 6, and such escape is fully prevented bythe sealed packing-rings 7 8 between the air-chambers and therunning-joints. The outside vanes -15 have been shown as extending fromthe impeller edge to the packing-rings; but this length may be varied,and in some constructions it may be found that only narrow vanes at theedge of the impellers are required. The construction shown, however, ispreferable. The air-chambers are of especial importance in connectionwith the vanes on the outside of the impeller, as they avoid thefriction of water on the sides of the impeller and casing; but theoutside vanes, with the balancing-chambers and packing-rings, may beused with the outside vanes, running in liquid instead of air.

While the invention has been shown as applied to a two-stage pump, itwill be understood that the broader features of the invention areapplicable also to single-impeller pumps and that the same constructionmay be used for any number of successive impellers.

l/Vhile the openings 20 and balancing-chambers 2,1 are preferably usedfor balancing the pump, it will be understood that this feature is notessential to the invention, consid-l the combination with an inclosedimpeller, of

air-chambers on the opposite sides of the impeller, vanes in saidchambers carried by the impeller, and a series of packing-rings on thecasing and impeller closing the inner side of said chambers.

3. In a centrifugal, turbine or similar pump, the combination with aninclosed impeller, of air-chambers on the opposite sides of theimpeller, vanes in said chambers carried by the impeller, asuction-balancing chamber on the back of the impeller communicating withthe impeller-suction, a running-joint outside said balancing-chamber,and packing-rings on the casing and impeller closing the inner side ofsaid air-chambers.

4. In a centrifugal, turbine or similar pump, the combination with aninclosed impeller, of air-chambers on the opposite sides of theimpeller, vanes in said chambers carried by the impeller, asuction-balancing chamber on the back of the impeller communicating withthe impeller-suction, and a running-joint outside saidbalancing-chamber.

5. In a centrifugal, turbine or similar pump IOO IOS i IIO IIS

the combination with an inclosed impeller, ot' i air-chambers on theopposite sides ot' the imimpeller, passages through the im pellerconneeting the air-chambers, packing-rings on Y the casing and iinpellerclosing the inner side l ot' said chambers, and liquii'l-passagesthrough the inipeller connecting the packing-rings on opposite sides ofthe impeller.

'i'. In a centi'itugal, turbine orsimilar pump,

the combination with an inclosed impeller, ot' i air-chambers on theopposite sides ot' the iinpeller, Yanes in said chambers carried by theimpeller, a suction-balancing chamber on the back ot' the impellercommunicating' with the impeller-suctioii, a runningjoint outside saidbalancing-chamber, packing-rings on thecasing and impeller between theair-chambers and joint, and liquid-passages through the impellerconnecting' the packing-rings on opposite sides of the impeller.

8. [n a centrifugal` turbine orsimilar pump, the combination with arotary iinpeller, ot' a balancing-chainber on the back ot' the impellercommunicating with the impeller-suction, a running-,joint outside saidbalancingchamber, a series o'll packing-rings on the casing andiiiipeller outside said running-joint, a chamber on the back of theimpeller outside said packing-rings, and Yanes carried by the impellerrunning in said chamber.

9. lnacentrit'ugal, turbine orsimilar pump, the combination with arotary impeller, ot' a balancing-chamber on the back ot' the impellercommunicating' with the impeller-suction, a running-joint outside saidbalancingchaniber, a series et' packing-rings on the casing and impelleron each side ot' the iinpeller, \\'anechambers on opposite sides ot' theimpeller outside said packing-rings, and Yanes carried by the impellerrunning in said vanechainleiers.

1l). ln a multistage centrifugal, turbine or siniilarpump, thecombination with a plurality of inclosed impellers, of air-chambers onthe opposite sides of the impellers, and Yanes in said chambers carriedby the iinpellers.

il. In a multistage centrifugal, turbine or similar pump, thecombination with a plurality f ot' inclosed impellers, ot' air-chainberson the l peller, ot' air-chambers on the opposite sides opposite sidesot' the impellers, Yanes in said chambers carried by the impellers, andpassages through tlie impellers connecting the airchambers ot' thedifferent iinpellers.

12. ina multistage centrifugal, turbine or similar pump, the combinationwith a plurality ot' inclosed .impellers, of air-chambers on theopposite sides ot' the impellers` Yanes in said cl'iaiiibers carried bythe impellers, and packing-rings on the casing and iiiipellers closing Ithe inner side ot' said chambers.

1?. In a multistage centrifugal, turbine or similar pump, thecombination with a plurality ot' inclosed impellers, of air-chambers onthe opposite sides ot' the impellers, Yanes in said chambers carried bythe impellers, packingrings on the casing and impellers closing theinner side ot' said chambers, and liquid-passages connecting thepacking-rings ot' the dil'- ferent impellers.

il. ,ln a multistage centrifugal, turbine or sim ilar pump, thecombination with a plurality of inclosed impellers, ot' air-chanibers onthe opposite sides ot' the impellers, Yanes in said chambers carried bythe impellers, packing'- rings on the casing and impellers closing theinner side ot' said chambers, passages through the iinpellers connectingthe air-chainbers oli the different impellers, and liquid-passagesConnecting the packing-rings of the different impellers.

15. The combination with a plui'alityl ot' iuelosed impellers, otlair-cliaiiibers on the opposite sides ot' the impellers, Yanes in saidchambers carried by the impellers, balancingchambers ou the backs of theinipellers communicating with the inipeller-suctions, and packing-ringson the casing and iinpeller between the balancing-chambers andair-chainbers.

16. The combination with a plurality of impellers, ot`balaneilig-chambers on the backs ot' the iinpellers communicating withthe impeller-suctions, ri'ini'iing-joints outside saidbalancing-chambers` vane-chambers on the backs ot' the impellers outsidesaid joints, packing-rings on the impellers and casing between saidchambers and joints, and Yanes in said vane-chambers carried by theiinpellers.

17. The combination with a plurality ot' impellers, ot'balaueilig-chambers on the backs ot' the impellers communicating withthe impeller-suctions, running-joints outside said balancing-chanibers,Ya11e-chambers on opposite sides of the impellers outside said joints,packing-rings on the impellers and casing between said chambers andjoints, Yanes in said chambers carried by the impellers, andliquidpassages ci'iiinectingl the packing-rings of the dill'erentiinpellers.

18. In a centrifugal, turbine or similar pump, the combination with aninclosed iinot'the impeller, and passages through the impellerconnectingl said chambers.

i9. ln a multistage centrifugal, turbine or similar pump, thecombination with a plurality IOO IIO

IO impellel's connecting' the air-chambers of the different impellers,and liquid-passages conneeting the packing-rings of the differentimpellets.

' ln testimony whereof I have hereunto set my hand in the presence oftwo subscribing Witnesses.

FREDERICK RAY. Witnesses:

U. J. SAWY'EP., lV. H. KENNEDY.

